I build MySDS Manager, a tool for small businesses to organize their Safety Data Sheets (SDS) for OSHA compliance. One question comes up constantly from users: "Do our SDS documents expire?"
The honest answer is more interesting than a yes/no, and it's a good example of a compliance trap: the absence of a rule isn't the same as being off the hook.
No expiration date, but that's not the whole story
OSHA's Hazard Communication Standard (29 CFR 1910.1200) does not set a formal expiration timeline for SDS documents. There's no "SDS goes stale after N months" clause anywhere in the regulation. Businesses regularly take this to mean the paperwork, once filed, is done.
It isn't. The same standard requires employers to provide "the most current hazard information available" to employees. If a manufacturer has published a revised SDS and you're still handing out the old one, you're technically out of compliance — not because of an expiration clock, but because a newer, more accurate version exists and you didn't adopt it.
What actually triggers a revision
Manufacturers update SDS documents for five main reasons:
- New toxicological research changes the known hazard profile
- GHS reclassification shifts a substance into a different hazard category
- The product formulation itself changes
- Exposure limits are updated by OSHA or ACGIH
- Emergency response procedures are improved based on incident data
None of these follow a predictable calendar. A sheet can be perfectly current for eight years, or obsolete in eight months, depending on what the manufacturer's regulatory and safety teams are doing.
The 3-to-5-year guideline (and why it's a floor, not a rule)
Industry practice, not OSHA mandate, suggests reviewing manufacturer versions every 3 to 5 years. Treat this as a maximum interval for checking, not a green light to ignore anything younger than that. The actual signal to watch is the revision date in Section 16 of the SDS itself — that's where manufacturers log the last update.
The cost of getting this wrong
During an OSHA inspection, filed SDS documents get compared against the manufacturer's current published version. If there's a mismatch and a newer version existed that you didn't have on file, that's a citable HazCom violation. Current OSHA penalties start at $16,550 per violation — and "we didn't know it changed" is not a defense, because the standard puts the burden on the employer to maintain current information.
What we tell users to actually do
- Audit on a cycle, not reactively. Don't wait for an inspection to check Section 16 dates.
- Prioritize anything older than 3 years for a manual check against the manufacturer's current published SDS.
- Track revision dates systematically. This is the single biggest gap we see — most small businesses have a binder or a shared drive with no way to tell, at a glance, which sheets are due for a check.
That last point is really the whole reason a tool like this exists: the regulation itself is reasonable ("keep it current"), but doing that by hand across dozens or hundreds of chemical products is where compliance quietly breaks down.
Full write-up with the risk-assessment table and FAQ is on our blog: Do Safety Data Sheets Expire?
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